Codility BinaryGap

solution.js

# https://app.codility.com/programmers/lessons/1-iterations/binary_gap/

function solution(n) {
	let max = 0;
	decimalToBinaryString(n).split('1').forEach((zeros, index, array) => {
		if (
			zeros.length > max 
			&& array[index - 1] !== undefined 
			&& array[index + 1] !== undefined
		) {
			max = zeros.length;
		}
	});
	return max;
}

function decimalToBinaryString(n) {
    return n.toString(2);
}